Video shows Naya Rivera's arrival at the pier 1:03
(CNN) - The search for the body of "Glee" actress Naya Rivera resumes this Friday after she disappeared from a lake in southern California.
Authorities have said they presume Rivera, 33, died after a boat ride he took Wednesday with his four-year-old son, Josey Hollis Dorsey.
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This is what we know so far:
The tour
According to the Ventura County Sheriff's Office, Rivera arrived at Piru Lake in Ventura County, California, north of Los Angeles, around 1 p.m. PST on Wednesday.
She rented a boat, and she and her son were seen heading out to the lake together, Sheriff Captain Eric Buschow said at a press conference.
Naya Rivera: 5 series of which she was part 0:56About three hours after they left the dock, another boater on the lake discovered a drift boat with the sleeping boy on board.
The boat was found in the area called "The Narrows" at the north end of the lake.
Authorities were notified and search and rescue efforts began from the air and with a diving team.
Buschow said it was difficult to obtain information from the boy, who told them they were going to swim, but that his mother did not return to the boat when she did.
The boy had a life jacket and an adult life jacket was found in the boat, according to Buschow.
An extensive search
Looking for Naya Rivera in Lake California 0:59The search and rescue mission was suspended on Wednesday night and the first light resumed on Thursday.
Authorities said more than 80 people were involved in the search for Rivera, best known for playing Santana López in Fox's hit series "Glee," which ran from 2009 to 2015.
MIRA: Who is Naya Rivera? The "Glee" actress disappeared into a lake.
The lake was closed for search.
“Multiple professional search and rescue teams are actively searching for clues to the location of Naya Rivera on Lake Piru. With more than 80 people involved in the search at this time, we are using helicopters, boats, ATVs, and ground personnel to try to locate her, ”the Ventura County Sheriff's office tweeted.
Authorities announced Thursday that the operation had gone from a search and rescue to a search and recovery mission.
MIRA: Gaya actress Naya Rivera is presumed dead after disappearing into a lake in California, authorities say
"We presume an accident occurred and assume she drowned in the lake," MP Chris Dyer said at a news conference. Thursday. "We hope for the best, we prepare for the worst."
He said it's not uncommon for visitors to go to the lake in the middle of the week as there are likely to be fewer people and less traffic.
The boat Rivera rented was a pontoon with a deck and the rental operator didn't notice anything out of the ordinary, Dyer said.
The boat was found at the northern end of the lake where wind is often a factor in sailing conditions.
Dyer said that the depth of the lake can be from 2 to 40 meters and that the bottom of the lake has a lot of rubble.
He also said that Rivera's son was healthy and with his family.
Security video
On Thursday, the Ventura County Sheriff's Office tweeted a link to a security video posted on YouTube.
Look it here:
Video shows Naya Rivera's arrival at the pier 1:03The video shows Rivera walking through the parking lot of the lake, with her son behind her, as the two head to the dock, toward the boat she had rented.
They then leave the dock and travel north on the boat on the lake, the video shows.
Authorities also tweeted the 911 call in which a boat rental company employee reports on Rivera's disappearance and the discovery of her son.
This is an updated link to the 911 recording reporting Naya Rivera as a missing person. https://t.co/kxIMN5HVfS
- Ventura Co. Sheriff (@VENTURASHERIFF) July 9, 2020
Hope and despair
Celebrities and fans have been talking about Rivera on social media since the news of his disappearance.
There was sadness at the possibility that she was dead and the hope that they would find her safe.
"I am waiting against hope ... this was all a great joke and she will appear from somewhere laughing out loud," tweeted Iqbal Theba, who played director Figgins on the show.
Singer-actress Demi Lovato, who played one of Santana's girlfriends, Dani, on "Glee," also tried to stay positive on Twitter on Thursday.
"I don't tweet often, but sometimes my tweets come true, so together let's say on Twitter that Naya will be safe and sound !!" Lovato tweeted. "Let's go! Let's put this energy out there: you will find it healthy and alive! ”
Naya Rivera